Core-bar



J. W. MAGFA-RLAN-E.

G0re .Ba.r.

No. 240,145. 7 Patented April 26', I88].

N.PETERS, PNOTO-LITHCIGRAFHER, WASHINGTON. D. O.

UNITED STATES PATENT OF ICE.

JAMES W. MAOFARLANE, OF GLASGOW, COUNTY OF LANARK, SCOTLAND.

CORE-BAR.

SPECIFICATION forming partof Letters Patent No. 240,745, dated April 26, 1881.

Application filed Dccem h r 24, 1880. (No model.) Patented in England March 2, 1880.

To all whom it mag concern.-

Be it known that I, JAMES WRIGHT MAG- .FARLANE, a subject of the Queen of Great Britain and Ireland, and residing at Glasgow,

county of Lanai-k, Scotland, have invented a certain Improvement in Gore-Bars, (for which I have obtained a patentin Great Britain, No. 91?, March 2, 1880,) of which the following isa specification.

My invention relates to the cores employed when casting iron pipes and similar articles, and in carrying it out the core is l'ormedin a core-boxot' any suitable known kind, and by prei'erence of dry sand, and the castmgoperation is, by preference, performed withthe molds in a vertical position. The core-bar em:

ployed is of a l'ormwhieh, in cross-section, resembles a ratchet-toothed wheel, and rods are placed at the indentations or grooves, such rods being witlnlrawn, so as to form air-holes after the mold material has been rammed into the core-box. After the casting operation the core-bar is released by turning it slightly.

In the accompanying drawings, Figure 1 is a side elevation of the core-bar with a part supposed to he broken away i to reduce the length, and Figpzuisa vertical longitudinal section. Fig. 3 is a plan corresponding to Fig. l, and Figs. 4 and 5 are horizontal or crosssections, while Fig. 6 is'a vertical section.

The core-bar ltlis a hollow casting, the body or main part of which is in cross-section, as seen in Figs. 4 and 5, shaped like a ratchettoothed Wheel. The tooth-like parts are representedasflat; lmttheymightbe curved without; disadvantage. f When the core-bar 10 is being prepared to have acore rammed upon it,rods 11 are placed in the angles or indentations between the toothlike ribs or projections, these rods being held at their upper; ends by. a disk or plate, 12,

which is temporarilyattached to asquare neck,

,13, forrned at; the top of the core-bar. An eyebolt, 14, isfpassed through the plate 12 and screwed into a center piece, 17, on the under bar is turned to free it, substantially as set forth.

scribing witnesses.

can be applied to turn and loosen them in the sand before withdrawing them, and when the core is being rammed the lower ends of the rods 11 are held in position by passing a wire or string round the bar, or in any other 0011- venient way. In Fig. 4 the core-bar 10, with. rods 11 in position, is shown as in the corel)OX 16 with the mold material rammed in, the corebox 16 represented being of the kind formed by a cast-iron shell slit longitudinally at one part and forcibly closed, and which atterward springs open sufficiently to free the core. When the core has been rammed the rods 11 are withdrawn and form air-holes, the plate 12 being disconnected from the neck I3 6 of the core-barand lit'tedotfwith the rods. At} ter the castingoperation has been efl'ected and when the metal has become sutlicientlypool, the core-bar 10 is loosened by turningit round to a slight extent; by means of'a lever-key ap-, 7o plied to its square neck 15, and this movement brings the parts into the relative positions in which they are shown in Fig. 5, the n|o tprojecti'ng parts of the ribs being in the air-holes and the broad parts slightly but snfliciently away from the parts of the mold material withwhich they were in oontact,thus allowing the core-bar to be very easily withdrawn.

The inner lower end of the core-bar is provided with the usual lugs or projections, 18, forming parts of bayonet-joints for securing the plate which closes the bottom ot' the moldbox, or when the pipe is east with the faucet downward for securing the metal center ofthe faucet-core.

1 claim as my invention- The combination consisting of the core-bar 10. made with longitudinal ratchet-shaped ribs, and the rods 1l,the said rods being placed beside the ribs to form holes into which the pro- 0 jecting edges of the ribs can move when the In testimony whereof Ihave signed my name to this specification in the presence 011' two su'b- 5 JAMES W. MAGFARLANE. t

Witnesses: y EDMUND HUNT,

LooK MOORE. 

